Numerical simulation of type III bursts

Results of numerical simulations for three models of type III solar radio bursts are discussed. These models include: (1) normal type III bursts on meter waves which show the maximum flux density in the meter-wavelength range; (2) low-frequency type III bursts which have a broad maximum of very high flux density at about 300 and 100 kHz; and (3) type III bursts caused by a high-density electron beam whose cross-sectional area is very small compared to the observed size. Results indicate that if the fundamental radio emissions occur as the normal type III bursts, the emission mechanism would be different from the scattering of plasma waves by ions.